Organic photoreceptor and manufacturing method thereof

Abstract

Disclosed is an organic photoreceptor, which is composed of a photosensitive layer and a protective layer, provided on an electric conductive support, and the protective layer contains a composition obtained by hardening reaction of γ-alumina particles treated with a compound having a reactive functional group with a hardenable compound. A manufacturing method thereof is also disclosed.

Description

[0001]This application is based on Japanese Patent Application No. 2009-189836 filed on Aug. 19, 2009, in Japanese Patent Office, the entire content of which is hereby incorporated by reference.FIELD OF THE INVENTION[0002]The present invention directs to an organic photoreceptor used in the field of an image forming apparatus and manufacturing method of the organic photoreceptor.BACKGROUND[0003]An organic photoreceptor containing an organic photoconductive material is most widely employed in the electrophotography. While the organic photoreceptor has such advantages that it is easy to develop materials corresponding to various exposing light source from visible to infrared light, materials without environmental contamination can be selected, and manufacturing cost is low, in comparison with the other photoreceptor, there is a problem that mechanical strength is weak and it is liable to generate deterioration or damage on a surface of the photoreceptor during a plenty sheets of copyi...

AI Technical Summary

Benefits of technology

[0019]Strength of surface of the photoreceptor against abrasion and scratches is improved remarkably, and surface durability and wastage thickness are improved, occurrence of black spots, as well as mage blur under ambience of high temperature and high moisture are improved markedly by the photoreceptor according to this invention.

Problems solved by technology

While the organic photoreceptor has such advantages that it is easy to develop materials corresponding to various exposing light source from visible to infrared light, materials without environmental contamination can be selected, and manufacturing cost is low, in comparison with the other photoreceptor, there is a problem that mechanical strength is weak and it is liable to generate deterioration or damage on a surface of the photoreceptor during a plenty sheets of copying or printing.

The colloidal silica containing hardenable siloxane resin has high moisture absorbing characteristics both in hardenable resin having siloxane bond (Si—O—Si bond) and colloidal silica, and therefore, electric resistivity of the protective layer is liable to lower and causing image blur or image flow.

Though fillers such as metal oxide are incorporated in the protective layer, bonding between the filler and the hardenable resin is weak, mechanical strength required to the protective layer is insufficient, and the problems of image blur or image flow is not dissolved sufficiently.

However, the bonding between the alumina particles and the hardenable resin is weak in the protective layer by this method, the alumina particles is not dispersed uniformly in the protective layer sufficiently, strength of the protective layer is not is insufficient, and cleaning deficiency is apt to occur.

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